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  Expansion Joint Waterproofing: Protecting Waterproofed Joints in Buildings Modern buildings are becoming taller, larger and more complex, with multiple basements, large podiums, terraces, parking areas and integrated services. As building structures become more complex, the number of joints and junctions also increases. Expansion joints, construction joints and service penetrations are essential parts of a building, but they can also become vulnerable points for water ingress and leakage if they are not properly waterproofed and protected. Why Are Building Joints Vulnerable to Water Leakage? Building joints experience movement due to temperature changes, structural movement and vibration. Waterproofing materials and sealants around these joints must therefore accommodate movement while maintaining water-tightness. External exposure can further increase the risk. In areas with heavy rainfall and humidity, joints on terraces, podiums, decks and other exposed surfaces m...